Intercooler to Throttle Body Y-Pipe
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Junior Member
Joined: Mar 2019
Posts: 52
Likes: 8
From: San Diego, CA, USA
2008 AMG S65
Intercooler to Throttle Body Y-Pipe
I'm addressing a boost leak on a 2008 S65 and I think it's the y-pipe. I've tried a variety of hose clamps but still get leaks near the intercooler interfaces. I'm considering buying a new y-pipe to see if it cures my issue. The part number for my model year is 2750981516. The newer engines use 2790980016. Intercooler and throttle body part numbers between the M275 and M279 are the same, so it seems the same y-pipe could be used. I'd prefer to use the latest version if possible in case there's an improvement. Does anyone have experience with this? Or will I have to be the guinea pig? Other cures for sealing this y-pipe? Thanks.
Super Member
Joined: May 2019
Posts: 671
Likes: 288
From: Omaha, NE
2007 S600
Call me crazy, but I'd try some self-fusing silicone tape. I picked some up at Oshkosh a few years ago. Works well, stands up to heat, and if you do it right (stretch and wrap) it sticks to itself quite well.
Thread Starter
Junior Member
Joined: Mar 2019
Posts: 52
Likes: 8
From: San Diego, CA, USA
2008 AMG S65
I ended up ordering the M279 version of this part. The top surface is flat vs round like the M275 version. The space between left and right intercoolers is wider on the M279 version. Despite these differences it fit fine. The construction of the part looks the same, so probably no benefit to using the newer part.
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Joined: Apr 2020
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Exige S | V70R | CTS-V wagon | JKUR | 13 S65 (Mocha/Armagnac)
I went to change my oil and noticed my y-pipe was disconnected at the throttle body just a bit. I've removed it and found it is split a bit. Do I need to disconnect the intercoolers to install a new one - it doesn't appear there is a way to fit the connections to both intercoolers and the throttle body without removing at least one of the intercoolers.
Thread Starter
Junior Member
Joined: Mar 2019
Posts: 52
Likes: 8
From: San Diego, CA, USA
2008 AMG S65
I went to change my oil and noticed my y-pipe was disconnected at the throttle body just a bit. I've removed it and found it is split a bit. Do I need to disconnect the intercoolers to install a new one - it doesn't appear there is a way to fit the connections to both intercoolers and the throttle body without removing at least one of the intercoolers.
Super Member
Joined: May 2019
Posts: 671
Likes: 288
From: Omaha, NE
2007 S600
I ended up ordering the M279 version of this part. The top surface is flat vs round like the M275 version. The space between left and right intercoolers is wider on the M279 version. Despite these differences it fit fine. The construction of the part looks the same, so probably no benefit to using the newer part.
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Junior Member
Joined: Mar 2019
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From: San Diego, CA, USA
2008 AMG S65
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